Vibratory controlling device for dental and surgical instruments



Dec.- 11 1923. 1,476,976

- J. W. IVORY.

VIBRATORY CONTROLLING DEVICE FOR DENTAL AND SURGICAL INSTRUMENTS Filed Aug. 13 1921 ATTORNEYS.

Patented Dec. 11, 1923.

UNITED STATES JAMES W. IVORY, OF PHILADELPHIA, PENNSYLVANIA.

VIBRATORY CONTROLLING DEVICE FOR DENTAL AND SURGICAL INSTRUMENTS.

Application filed August 13, 192}.

To all whom it may concern.

Be it known that 1, JAMES W. IVORY, a subject of the King of Great Britain, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Vibratory Controlling Device for Dental and Surgical Instruments, of which the following is a specification.

My invention consists of a device for controlling, limiting or modifying the vibratory action of a burr, cutting or grinding stone, etc, held operatively in the hand piece of dental or surgical instruments, thus producing important effects on such instruments.

It consists also of details of construction as will be hereinafter set forth.

The invention is satisfactorily illustrated in the accompanying drawing, but the important instrumentalities thereof may be varied, and so it is to be understood that the invention is not limited to the specific details shown and described, as long as they are within the spirit or scope of the claims.

Figure 1 represents a side elevation of a hand piece having my invention applied thereto.

Figure 2 represents a partial side elevation,and a partial longitudinal section of a portion thereof.

Figure 3 represents a side elevation of a portion thereof.

Figure 4 represents a partial side elevation thereof, and a partial longitudinal section. thereof on line 4-4: Figure 11.

Figure 5 represents a longitudinal section of a portion of another embodiment of the invention.

Figure 6 represents a side elevation of certain parts of the invention in separated condition.

Figure 7 represents a partial longitudinal section and partial side elevation of a portion of another form of an instrument embodying my invention.

Figure 8 represents a transverse section on line 88 Figure 2, on an enlarged scale.

Figure 9 represents a longitudinal section on line 9-9 Figure 8, on an enlarged scale.

Figure 10 represents a transverse section of another embodiment of the invention.

Figure 11 represents a transverse section on line 11--11 Figure 4:, on an enlarged scale.

Similar numerals of reference indicate corresponding parts in the figures.

Eerial No. 491,967.

Referring to the drawings.

1 designates a hand piece employed for dental or surgical purposes, which excepting the feature of my invention applied thereto is of usual order.

2 designates the shank of the burr 3 or that of the grinding stone 4, or other working member of the hand piece.

On said shank is fitted the device 5 for controlling, limiting or modifying the vibrating action of said burr, grinding stone or other working member, said device consisting of a tubular piece or collar of elastic or resilient material which is interposed between the forward end of the inner nose piece 6, which contains the holding chuck of the shank and of the closing front wall 7 of the forward end of the anterior nosepiece 8 which thus incloses said device 5 8.110. said nose 6, said wall having centrally therein the perforation or opening 9 through which said shank passes.

As the resilient collar is peripherally inclosed by the nose piece 8 and its front side is seated against the front closing wall 7 of said nose piece 8, and on its rear side by the shoulder formed by the front end of the nose piece 6, said collar is thereby retained in position without liability to dis placement.

The'anterior nose piece 8 is connected at its rear end with the split sleeve 8 which encircles the adjacent portion of the hand piece and is connected therewith by the screw or stud 10 on said portion, said screw or stud engaging the walls of the division of said sleeve 9, thus also holding said anterior nose piece 8 and consequently the resilient collar 5 in position.

The split or division of the sleeve 9 where it is embraced by the screw or stud 1O flares from the longitudinal split of the sleeve to the rear terminal of the sleeve, so as to provide a wide entrance of the sleeve over the screw or stud 10 and directs the walls of said flare true to the latter. Then as the flare reduces in width to its base it closes tightly on the side of said screw or stud 10 and takes firm hold thereof, thus retaining the sleeve and consequently the nose piece 8 firmly in position during the operation of the instrument. It will be seen that when the instrument is in use, the device 5 provides a yielding cushion serving to control, limit or modify the action of the burr, cutting stone, etc., thus obviating harshness and Referring to Figures 8 and 9, the device 5 has in its interior the bushing 11 of metal or other material harder than said device 5 through which passes the adjacent portion of the shank 2 and whose terminals are formed with flanges or shoulders 12 which embrace the ends of the device 5, thus firmly connecting the bushing with the device, and in a measure reinforcing the latter, and allowing the shank 2 to contact directly with said bushing without affecting the vibratory nature of the device.

In Figures 4, and 10, the device is exteriorly encircled by the sleeve 18 of metal or other suitable material said sleeve being adapted to contact with the inner side of the front Wall 7 of the anterior nose piece 8, while strengthening the device without divesting it of its resilient nature.

The device is substantially cylindrical, as shown in Figures 2, 8, 9, 10 and 11, while it is conical as shown in Figures 5 and 7.

In Figure 6, the device is primarily cylindrical and it is stretched on the nose 6 whereby it assumes the conical form of the evident, as in Figures 5 and 6, that the nose 6 may be formed in one piece with the casing 1% of the instrument, without producing different results of the elastic or resilient device 5. It is evident that in arranging the location of said device, the anterior sleeve or casing 8 requires to be lengthened slightly to accommodate said device to the position in which it is placed on the shank 2 between the contiguous parts hereinbefore stated.

It will be seen that the shank or spindle of the burr or that of the mandrel on which latter the grinding stone ismounted is engaged by the chuck without the interposition of any material, and so said shank is held in the chuck in the usual manner, resilience being provided by the device 5 to produce the result in the instrument as hereinbetore stated.

Having thus described my invention what I claim as new and desire to secure by Let ters Patent, is

1. In a dental hand piece of the character stated, a hand piece, a toolv carrying shank, an inner nose piece, an anterior nose piece, a resilient tubular member on said shank between the adjacent torward ends of said. inner and anterior nose pieces. a slccie extending rearwardly of the anterior nose piece to the forward member of the hand piece, and means for connecting said sleeve with said men'iber of the hand piece.

2. In a dental hand piece oi. the character stated, a hand piece, a tool carrying shank, an inner nose piece, an anterior nose piece, a resilient tubular member on said shank between the adjacent forward ends of said inner and anterior nose pieces, a sleeve extending rearwardly of the anterior nose piece to the torward member of the hand piece, means for connecting said sleeve with said member of the hand piece, and a bushing 011 the shank oi the tool carrier between said shank and the inner nose piece.

3. In a hand piece of the character stated, a tool carrying shank, an inner nose piece, an anterior nose piece, a resilient tubular member on said shank between the adjacent ends of said nose pieces, a dividend sleeve connected with said anterior nose piece, and a screw like member on the hand piece adapted to engage the divisional wall of said sleeve, the portion of the division walls of the sleeve were engaged by said member being flaring from the longitudinal split of the sleeve to the rear terminals oi said sleeve.

JAMES V. IVORY.

Witnesses JOHN A. lVinnnnsumar, N. Bussmenn. 

